ACPI IRQ/Interrupt resources contain a bit that describes if the
interrupt should wake the system. This change exposes that bit via
a new IORESOURCE_IRQ_WAKECAPABLE flag. Drivers should check this flag
before arming an IRQ to wake the system.
Signed-off-by: Raul E Rangel <rrangel@xxxxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
Changes in v5:
- Removed clang-format white space changes
Changes in v4:
- Added Reviewed-by
- Reformatted with 96 char limit
Changes in v3:
- Fixed bad indent
Changes in v2:
- Added ability to extract wake bit from Interrupt/IRQ resources
drivers/acpi/irq.c | 8 +++++---
drivers/acpi/resource.c | 16 +++++++++++-----
drivers/pnp/pnpacpi/rsparser.c | 7 ++++---
include/linux/acpi.h | 2 +-
include/linux/ioport.h | 3 ++-
5 files changed, 23 insertions(+), 13 deletions(-)
diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
index dabe45eba055d1..4bb5ab33a5ceb1 100644
--- a/drivers/acpi/irq.c
+++ b/drivers/acpi/irq.c
@@ -147,6 +147,7 @@ struct acpi_irq_parse_one_ctx {
* @polarity: polarity attributes of hwirq
* @polarity: polarity attributes of hwirq
* @shareable: shareable attributes of hwirq
+ * @wake_capable: wake capable attribute of hwirq
* @ctx: acpi_irq_parse_one_ctx updated by this function
*
* Description:
@@ -156,12 +157,13 @@ struct acpi_irq_parse_one_ctx {
static inline void acpi_irq_parse_one_match(struct fwnode_handle *fwnode,
u32 hwirq, u8 triggering,
u8 polarity, u8 shareable,
+ u8 wake_capable,
struct acpi_irq_parse_one_ctx *ctx)
{
if (!fwnode)
return;
ctx->rc = 0;
- *ctx->res_flags = acpi_dev_irq_flags(triggering, polarity, shareable);
+ *ctx->res_flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
ctx->fwspec->fwnode = fwnode;
ctx->fwspec->param[0] = hwirq;
ctx->fwspec->param[1] = acpi_dev_get_irq_type(triggering, polarity);
@@ -204,7 +206,7 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
fwnode = acpi_get_gsi_domain_id(irq->interrupts[ctx->index]);
acpi_irq_parse_one_match(fwnode, irq->interrupts[ctx->index],
irq->triggering, irq->polarity,
- irq->shareable, ctx);
+ irq->shareable, irq->wake_capable, ctx);
return AE_CTRL_TERMINATE;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
eirq = &ares->data.extended_irq;
@@ -218,7 +220,7 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
eirq->interrupts[ctx->index]);
acpi_irq_parse_one_match(fwnode, eirq->interrupts[ctx->index],
eirq->triggering, eirq->polarity,
- eirq->shareable, ctx);
+ eirq->shareable, eirq->wake_capable, ctx);
return AE_CTRL_TERMINATE;
}
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 510cdec375c4d8..81733369f4c1de 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -336,8 +336,9 @@ EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
* @triggering: Triggering type as provided by ACPI.
* @polarity: Interrupt polarity as provided by ACPI.
* @shareable: Whether or not the interrupt is shareable.
+ * @wake_capable: Wake capability as provided by ACPI.
*/
-unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
+unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable, u8 wake_capable)
{
unsigned long flags;
@@ -351,6 +352,9 @@ unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
if (shareable == ACPI_SHARED)
flags |= IORESOURCE_IRQ_SHAREABLE;
+ if (wake_capable == ACPI_WAKE_CAPABLE)
+ flags |= IORESOURCE_IRQ_WAKECAPABLE;
+
return flags | IORESOURCE_IRQ;
}
EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
@@ -442,7 +446,7 @@ static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
u8 triggering, u8 polarity, u8 shareable,
- bool check_override)
+ u8 wake_capable, bool check_override)
{
int irq, p, t;
@@ -475,7 +479,7 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
}
}
- res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
+ res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
if (irq >= 0) {
res->start = irq;
@@ -523,7 +527,8 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
}
acpi_dev_get_irqresource(res, irq->interrupts[index],
irq->triggering, irq->polarity,
- irq->shareable, true);
+ irq->shareable, irq->wake_capable,
+ true);
break;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
ext_irq = &ares->data.extended_irq;
@@ -534,7 +539,8 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
if (is_gsi(ext_irq))
acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
ext_irq->triggering, ext_irq->polarity,
- ext_irq->shareable, false);
+ ext_irq->shareable, ext_irq->wake_capable,
+ false);
else
irqresource_disabled(res, 0);
break;
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index da78dc77aed32e..4f05f610391b00 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -206,7 +206,8 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
if (i >= 0) {
flags = acpi_dev_irq_flags(gpio->triggering,
gpio->polarity,
- gpio->shareable);
+ gpio->shareable,
+ gpio->wake_capable);
} else {
flags = IORESOURCE_DISABLED;
}
@@ -315,7 +316,7 @@ static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
if (p->interrupts[i])
__set_bit(p->interrupts[i], map.bits);
- flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable);
+ flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable, p->wake_capable);
pnp_register_irq_resource(dev, option_flags, &map, flags);
}
@@ -339,7 +340,7 @@ static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
}
}
- flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable);
+ flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable, p->wake_capable);
pnp_register_irq_resource(dev, option_flags, &map, flags);
}
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index cd7371a5f2839b..ea2efbdbeee511 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -495,7 +495,7 @@ bool acpi_dev_resource_address_space(struct acpi_resource *ares,
struct resource_win *win);
bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
struct resource_win *win);
-unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
+unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable, u8 wake_capable);
unsigned int acpi_dev_get_irq_type(int triggering, int polarity);
bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
struct resource *res);
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 616b683563a970..3baeea4d903bfd 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -79,7 +79,8 @@ struct resource {
#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
#define IORESOURCE_IRQ_SHAREABLE (1<<4)
-#define IORESOURCE_IRQ_OPTIONAL (1<<5)
+#define IORESOURCE_IRQ_OPTIONAL (1<<5)
+#define IORESOURCE_IRQ_WAKECAPABLE (1<<6)
/* PnP DMA specific bits (IORESOURCE_BITS) */
#define IORESOURCE_DMA_TYPE_MASK (3<<0)
--
2.37.3.968.ga6b4b080e4-goog
